Heater



Feb.28,1933. L JMARMGER 1,899,581

HEATER Filed Dec. 1l, 1931 11W/mf.

A MPL@ 7 and 8 are provided with apertures 10 by means of which jets of heating fluid are projected upwardly along the upright walls of the vat A and the lower duct 9 is preferably provided at opposite sides with similar apertures 11 for directing heating fluid in opposite directions against the bottom of the vat A. Any other means for conducting and discharging heating fluid may be provided in place of the particular means shown. lThe channels described, however, are desirable in that they have the further advantage of reinforcing the portions of the tank to which Y ducts 7 yand 8 are preferably similarly connected to a transversely extending duct 1a similar to the duct 12, and also having apertures for discharging heating fluid upwardlyV against the front wall of the vat. The duct 14 is preferably connected with the lowerl duct 9fby means of a short connecting duct 16, although other means for supplyingheating fluid to the lower duct 9 may be employed, if desired.' By means of the construction shown, all ducts are interconnected, and consequently, heating fluid may be supplied to the heater by 'means of a single kinlet pipe 17 extending through the front wall of the pasteurizing tank and communicating with the duct 14.

The heating fluid may be discharged from the tank lB through one or more overflow or discharge pipes 19, two such pipes being shown in the construction illustrated, having their upper ends terminating at the upper level of the liquid inthe tank. In this man` ner, the entire tank will be filled with fluid before any of Vthe fluid is removed therefrom.

In accordance with my invention, an overflow or storage reservoir isprovided into which the heating fluid passes after leaving thetank B, and this reservoirV may be arranged in any suitable or desired location with reference to the heater.V In the construction. shown, this reservoir is formed in. the lower portion vof the heater tank below' the inclined and bottom walls b and b1 thereof. This reservoir C is, inthe construction shown, formed by extending the four walls of the tank B downwardly to the desired extent'below the bottom of the tank, and a bottom wall 20Y connects the side walls to form'this reservoir C. lrepresents feet or legs by means of which the entire heater may be supported upon a floor. By arranging the storage reservoir or tank below the tank B, a very convenient arrangement results, so that the overflow pipes 19 may pass directly through the inclined walls b and discharge into the reservoir C, and liquid may be withdrawn from this reservoir for heating and for circulation in the tank B, and for this purpose, the front end of the storage reservoir C may be provided with a depressed portion 22 to which a discharge pipe 24 may be connected.

Any desired means may be provided for heating the liquid, and this may, of course, be accomplished either in the storage reservoir 'C or during the flow of liquid to the Vdistributing ducts in the tank B, or in bot-h places. In the construction shown, the flow of liquid from the storage reservoir into the tank B is produced by means of a steam ejector including a steam nozzle 25 arranged within an ejector housing 26, steam being admitted to the ejector nozzle from a steam pipe 27 through suitable connections including a valve 28 for controlling the flow of steam to the ejector. The water or other heating fluid passes from the ejector housing through a pipe 29 to the inlet pipe 17, preferably through. an elbow 30 which is shown as provided "with one or more steam nozzles 31 ar` ranged to supply steam to the fluid for heating the same. .Steamffor the heating nozzle 31 may also be supplied from the pipe 27, and as Y shown, is under the control of a valve 32. Any other means for heating the liquid and for imparting motion thereto to circulate the same in the tank B may be provided in place of the means described.

The invent-ion thus far described operates to supply the hot water or other heating fluid to the tank in such a manner as to brushor produce a scrubbing effect upon the walls of the vat A throughout substantially the entire surface thereof, so that very effective transmission of heat from the hea-ting fluid to the walls ofthe vat results. Since the warm fluid tends to risethis tendency is added to the force imparted to the j ets of fluid emerging Vfrom the orifices 10 Vand 11, thus causing an upward flow of the heating fluid, in spite ofthe cooling effect of the walls of the vat. Consequently, it is possible with the use of the arrangement shown to remove cooler liquid from` the upper part of the tank through the overflow pipes 19. In case too much heatingv fluid is supplied to the heater, another overflow pipe 34 is provided, which has its upper or intake end arranged above the level of the overflow pipes 19, and which discharges any fluid entering this pipe below the bottom of the storage reservoir C. This overflow pipe preferably also has a vent or overflow aperture 35m the upper portion of the storage annessi reservoir C, so that .excess .liquid may be--discharged from this reservoir, and so that air trapped, the .top .of this reservoir vWill not exceeded, if the heating iiuid were .permitted` to :remain in the tank B., even if steamfor heating and circulating the same were shut odi). :I have, consequently, provided means whereby the heating fluid-.or hot water can be Withdrawnifrom the tank B immediately upon the vattaining of the correct temperatureby the liquid in the vat il. In the construct-ion shoW-nfor this purpose,a Jliquid :discharge passage ,37 is the tank'B-arnd this discharge passage is control-ledbyv means .of a valve arranged to he opened automatically When the circulation of heating fluid isinterrupted. -I-n the construction shown, the discharge passage 37 is provided with a plunger valve 38, shown more in detail in Fig. 4; lThis plunger valve .is in the Vform of a cylinder through .which the liq uid` must passin iiowingfrom fthe. tan'ki to thestorage reservoir C. For this purpose, the cylinder 38 is provided With'an' inlet-opel ing 39 communicating with the tank'B 'for the liquid and a plurality .off-discharge .openings 40 communicating .with the storage reservoir C. These .openings are-controlledfby means .of aplungerfll. arranged in the cylinV der 3S. The plunger is moved to its upper-or closed position by means of pressure-in theV lower part of the cylinder 3S, yand this pressure -issupplied by mea-ns of a duct42, one end of 'which communicateswith the lower end Vof the-cylinder 38, and the 4otherend of which receives fluid pressure from the conduitl or .duct 14, as shown in Fig. 2. Consequently, it `will be obvious that when fluid under pressure is supplied to the duct 14, this pressure Will be connnunicated by thesmall -ductfi and Will move the plunger- 4l into its upper position, thus interrupting to the cylinder- .38',

the flow of Water from the tankV B to the reservoir C. "When this pressure is interrupted, as, for example, by the closing4 of the steam valve- 28. the plunger 4l `will immediately drop into its lou-'er position, thus` permitting the heating' fluid to drain from thetan-k B into the reservoir C. The plunger may: be caused to drop or uncover the openings 39 and 40 in any suitable manner, for example, by gravity and'by the 4pressure of Water acting on the plunger, as in the construction shown. Preferably, the liquid level does not drop below the bottom or' the vat A, so that a small portion of Vthe lower part ofthe vatA Will loe-.ex-

posed to the heating fluid,.to`V maintain the provided in the .lower portion of :liquid-Im the vat Aat the edesiilfed temperature. For example-,When liquid' .has been` ,felina-nem the. liquid level vin the tank. andreservoir may hefappronimatelyas indicated by-hroken 2li-nes .4.5 iii-Fig. ,3.V other meanslor enabling the heating .-uid- .to be quickly -i withdrawn from the tank B into a storage ieserlvoirm'hen the desired..teniperature the vatA has been .obtained,may 4:befprlovided.

By. :means- 1ofthe heating and circulating syste-m described, annee-tive -upwiard ilowx-of liquizdl iai-.the ltank results,

vat A.-since 'the' greatest.iafmotmtrof hea-tias `applied -..to.; the 1 bottom vof:l the 1 vat A, th-fus upward--direetion :by the tact-ion of the jets,

which fha-sia'. very desirable-.heating:.eifect. on ythey liquid in the y so'thatfthe Atendency ofthe cooler liquid' to v drop toward the bottom oi. the tank -is oven. come. by these jets, andthe .cooler liquid .fis consequently removed `froml -the top. fofl ,the tank by the overfiowv-pipes. Thearrange-` ment 'for introdigicing the heating ufluid 'at the lower end ofthe tank also .lends itselfiwell to the reinforcement of the tank by'thev channel members. 7.,.8 and' 9 atitfhose portions of the l l tank which aresubjected to thegaeatest. pres-. sure therefore, f-,havegithe :greatest-need tor-reinforcement.' i i Y 1:-

' By. instantly- Sivithdrawing :liquid trom theY` tank, Wh'enthe f desired :ateiriperaturejfofthe Y liquid the..vat has: been. obtained-,.--v an -ac cnrateicontro'liof the temperature yofthe incl the wat can be secured overheating :is positively prevented, `.The devi-ce fori-Withdrawing. the liquid -roin 'the tank f'is :simple and.-inexpensivefalrd.operates -ivithout -depending iupon manual operation. rBytstoring the liquid fin thefreservoir 1G, -a'fterg the de sii-edi .temperature-:oit k,dief-liquid iin-:thes-vat A, has been obtainech the-.zheatiai .this liqulidisy conserved-and available When-themext. batch l of coldV liquid-` is i'ntrodri'ced into the tank-A. While @hand-operated.steam valves 28. and

iareffsliown `the -zdratvngL-g, yet `it-...willS-fbe obvious that When-the heater is operated then mostatic-ally, mechanically .or electrica-lly.y operated vsalveslmay be aised inplaoe of those shown. 7

Iltclaim: V- f f1. A- luid .heat-ing and circulating system for heaters. including Iajcontainer for thief liq-uidftobe heated-and "a tank into .which said containerextends andw'hic'h forms with if saidbontainer a spa-ce for the circulation of heating tl-uidfmeans for admitting heatv ing lfluid` in theV lower and directing said heatingilui-dupwardly, and mea-ns at the upper portion oil-said` space v for WithdraW-ingfluid therefrom. 2. A fluid heating and circulating system for heaters,`l including a container for the portions Lof said space liquid to be heated and a tank into which said container extends and which forms with said container a spacefor the circulation of heating fluid, and means for introducing heating 5 fluid in Ythe lower portion of said space and for withdrawing fluid from theupperpor.- tion thereof. l A .3. A fluid heating and circulating system for heaters, .including a container for the 1.0 liquid to be heated and a tank into which said Vcontainer extends andl which forms with sai container a. space for the circulation of heating .flu-id, means for introducing heating fluid in the lower portions of said space, and 'f1.5 an overflow duct for withdrawing fluid-from the upper portion of said space.

Y el. `A fluid heating and circulating system Y for heaters, including a container forY the liquid to be heated and a tank int-o which said .20 container extends and which forms with said container a spacefor the circulation of heating fluid, 'means for introducing heating fluid in the lower portions of said space, an overflow duct for withdrawing fluid from the upl per portion of said space, and means for heating fluid voverflowing the upper portion of said tank and returning the same to the lower portionthereof. 1 5. A heater, including a tank for the heating fluid'and ya container. for the material to be heated;.extending into said tank, a combined fluid circulating and Vheating system including a reservoir into which fluid is discharged fromsaid tank and-which is formedk 351 in the lower portion `of said tank and separated from 'the tank by avpartition, means for returning the fluid from' said reservoir to said tank, and means for-imparting heat to said fluid before returning the same tosaid tank. i340. k6. A heater, including a tank for Water and-a container for the material to be heated extending into said tank, a steam injector nozzle arranged to'supply heat to the water in said tank and for discharging the heating 145; fluidinto the lower portions of said tank,

and distributing ducts extending lengthwise of said tank in the lower porti on thereofand provided vwith means forV Vdistributing the heating fluid to different portions of the tank 510i lengthwise thereof.

7 A'pasteurizer, including a. tank for heat-- ing fluid, a vat for the liquid to be pastuerized extending into said tank and forming with said tanka space for the circulation of pas-y S teurizing fluid, distributor ducts arranged at opposite'sides of said tank and in the lower portions thereof and providedwith apertures for discharging heating fluid at intervals into said space, and an injector nozzle discharg- Vtaxing yheating' fluid into fluid from said'tank and discharging the mixed fluids into all of said distributor ducts tov introduce the same into said tank and to produce circulation in safd space.

65.; 8., A heater, including a tank` for heating fluid and acontainer for material to be heated extending into said tank, means for introducing heating .fluid into said tank, a drain passagefor draining liquid' from said tank and avalve in said passage held in closed position by the pressure of fluid introduced into said tank, said valve opening when the introduction of fluid to said tank ceases.

' 9. A heater, including a tank for heating fluid and a container for material to be heated extending into said tank, an injector for discharging heating fluid into said tank, adr'ain passage for draining heatinglfluid from said tank, a valve in said drain passage, said valve normally occupying an open position and bcing moved into closed position bythe pressure'of fluid discharged by said injector.-

10. A heater, including a tank for heating fluid and av container for material to be heated extending linto said tank, means for introducing heating fluid into said tank, and moans for draining a portion of the heating fluid from said tank when the supplyv of heating fluidtosaid tank is interrupted, and leaving in said tank sufficient heating fluid'to impart heat to the bottom portion only of said container.

11. A heater-,includinga tank for heating fluid-and a container for material to be heated extending into said tank, means for introducing heatin fluid into said tank, mea-ns for draining uid from said tank when said means for introducing heating fluid into said tank ceases to function, and a storage reservoir into which said fluid is drained, said means for introducing heating fluid from said tank withdrawing heating fluid from said reservoir.

12. A heater, including a tank for heating fluid'and a-container for material to be heated extending into said tank, a storage reservoir for heating fluid arranged at a Vlower level than sai-d tank toreceive the greater part of the fluid from said tank by gravity,` means for withdrawing heating fluid from said reservoir and discharging the same to said tank, means for imparting 'heat to said fluid beforedischarging the same into'said tank, and an overflow duct discharging fluid from said tank to said reservoir. l A

13.V A heater, including'a tank for heating fluid and a container for material to be heated extendinginto said tank, a storage reservoir for heating fluid, means for withdrawing heating -fluid from said reservoir and discharging the same to said tank, means for imparting heat to said fluid before discharging the same'into said tank, an overflow ductdischarging fluid from said tank to said reservoir, and means for draining liquid from said vtank into said-reservoir when the discharge of fluid into said tank is interrupted.

14;.v A pasteurizer, including a tank for heatingffluid, a vat for the liquid to be pasteurized extending into said tank and form- Cil ing with said tank a. space for the circulation of pasteurizing fluid, a. reservoir arranged beneath said pasteurizing tank, an overflow pipe having its opening in the upper portion of said tank and discharging heating fluid into said reservoir, a drain passage connecting said tank near the lower portion thereof with said reservoir, means for introducing heating luid into said tank, and means for closing said drain passage when fluid is being intro duced into said tank and for permitting said drain passage to open when the flow of fluid into said tank is interrupted.

l5. A pasteurizer, including a tank for heating fluid, a Vat for the liquid to be pa-S- teurized extending into said tank and forming with said tank a space for the circulation of pasteurizing fluid, a reservoir arranged beneath said tank, means for discharging fluid from said tank to said reservoir, means for withdrawing fluid from said Vreservoir and discharging the same to said tank, means forV imparting heat to the fluid before the same is discharged to said tank, and means for dis-v charging a portion of the fluid from said tank to said reservoir when said discharging means ceases to operate, said portion of fluid remaining in said tank serving to impart a greatly reduced amount of heat to said vat.

16. A pasteurizer, including a vat for the y liquid to be pasteurized, a tank into which said vat extends and which ormswith said vat a space for the circulation means for introducing said fluid in the lower portion of said space and for withdrawing fluid from the upper portion thereof.

17. A heater, including a tank for heating Huid and a container for material to'be heated extending into said tank, means for introducmg heating fluid into said tank, means for maintaining the liquid in the tank at a level extending to the upper portion of said con? tainer, and means for draining fluid from said tank when said means for introducing heating fluid into said tank ceases tofunction.

LAWRENCE J. MARINGER.

of a fluid, and 

